syzbot


kernel BUG in ext4_mark_iloc_dirty

Status: upstream: reported C repro on 2024/04/30 10:27
Reported-by: syzbot+77f2cc7c61d748548b0a@syzkaller.appspotmail.com
First crash: 205d, last: 48d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 kernel BUG in ext4_mark_iloc_dirty C 67 27d 221d 0/2 upstream: reported C repro on 2024/04/13 22:22
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/10/03 22:03 12m retest repro android12-5.4 report log
2024/07/23 16:28 14m retest repro android12-5.4 report log
2024/05/14 11:35 12m retest repro android12-5.4 report log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:5505!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 358 Comm: syz-executor361 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:ext4_do_update_inode fs/ext4/inode.c:5504 [inline]
RIP: 0010:ext4_mark_iloc_dirty+0x3556/0x3560 fs/ext4/inode.c:6071
Code: f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 2b f1 ff ff 48 89 df e8 b9 27 cc ff e9 1e f1 ff ff e8 8f 0b 73 ff e8 5a 53 9c ff <0f> 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 53 50 49
RSP: 0018:ffff8881dcb67060 EFLAGS: 00010293
RAX: ffffffff81c7f3c6 RBX: 0000000000000000 RCX: ffff8881dcb56e40
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffff8881dcb671b0 R08: ffffffff81c7da79 R09: ffffed103d0e58f0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881dd579c00
R13: dffffc0000000000 R14: ffff8881dc72b000 R15: 0000000000000000
FS:  00007f8ce548a6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005584699c6fd8 CR3: 00000001dcc33000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_mark_inode_dirty+0x4e7/0x7a0 fs/ext4/inode.c:6273
 ext4_ext_rm_leaf fs/ext4/extents.c:2915 [inline]
 ext4_ext_remove_space+0x205d/0x4ba0 fs/ext4/extents.c:3124
 ext4_truncate+0xb23/0x1290 fs/ext4/inode.c:4641
 ext4_setattr+0xeb5/0x1500 fs/ext4/inode.c:5857
 notify_change+0xc00/0xeb0 fs/attr.c:354
 do_truncate+0x1ed/0x2d0 fs/open.c:64
 handle_truncate fs/namei.c:3103 [inline]
 do_last fs/namei.c:3521 [inline]
 path_openat+0x2de2/0x3480 fs/namei.c:3634
 do_filp_open+0x20b/0x450 fs/namei.c:3664
 do_sys_open+0x39c/0x810 fs/open.c:1113
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Modules linked in:
---[ end trace 6cefbd4a4426b61e ]---
RIP: 0010:ext4_do_update_inode fs/ext4/inode.c:5504 [inline]
RIP: 0010:ext4_mark_iloc_dirty+0x3556/0x3560 fs/ext4/inode.c:6071
Code: f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 2b f1 ff ff 48 89 df e8 b9 27 cc ff e9 1e f1 ff ff e8 8f 0b 73 ff e8 5a 53 9c ff <0f> 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 53 50 49
RSP: 0018:ffff8881dcb67060 EFLAGS: 00010293
RAX: ffffffff81c7f3c6 RBX: 0000000000000000 RCX: ffff8881dcb56e40
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffff8881dcb671b0 R08: ffffffff81c7da79 R09: ffffed103d0e58f0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881dd579c00
R13: dffffc0000000000 R14: ffff8881dc72b000 R15: 0000000000000000
FS:  00007f8ce548a6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005584699c6fd8 CR3: 00000001dcc33000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/30 10:20 android12-5.4 2d5d8240a7cb f10afd69 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-android-5-4-kasan kernel BUG in ext4_mark_iloc_dirty
2024/05/21 16:53 android12-5.4 51cf29fc2bfc 4c0d3ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan kernel BUG in ext4_mark_iloc_dirty
2024/04/30 09:51 android12-5.4 2d5d8240a7cb f10afd69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan kernel BUG in ext4_mark_iloc_dirty
* Struck through repros no longer work on HEAD.